Fire-retardant belt

Patent metadata

Field	Value
Publication number	US-10329121-B2
Application number	US-201715591585-A
Country	US
Kind code	B2
Filing date	May 10, 2017
Priority date	Jul 18, 2012
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A belt and a method for manufacturing a belt is provided. The belt includes a plurality of lengthwise-extending tension members and a jacket. The jacket substantially retains the plurality of tension members. The jacket has a first side region, a second side region, and a center region between the first and second side regions. The first and second side regions of the jacket are more fire retardant than the center region of the jacket.

First claim

What is claimed is:

1. A belt, comprising:
a plurality of lengthwise-extending tension members; and
a thermoplastic jacket substantially retaining the plurality of tension members, the thermoplastic jacket having a first side region, a second side region, and a center region between the first and second side regions;
wherein the first and second side regions of the thermoplastic jacket are more fire retardant than the center region of the thermoplastic jacket, the first side region and the center region are separated by a first boundary, and the second side region and the center rejoin are separated by a second boundary.

2. The belt of claim 1 , the thermoplastic jacket further comprising a first side surface opposing a second side surface, the first and second side surfaces extending between a first traction surface and a second traction surface.

3. The belt of claim 2 , wherein a widthwise distance between the first and second side surfaces is greater than a heightwise distance between the first and second traction surfaces.

4. The belt of claim 3 , wherein the first side region is contiguous with the first side surface, and the second side region is contiguous with the second side surface.

5. The belt of claim 1 , wherein the first and second side regions of the thermoplastic jacket have a higher concentration of a fire-retardant material than the center region.

6. The belt of claim 1 , wherein the first and second side regions of the thermoplastic jacket each include a first fire-retardant material and the center region of the thermoplastic jacket includes a second fire-retardant material, and wherein the first fire-retardant material is more fire retardant than the second fire-retardant material.

7. The belt of claim 1 , wherein the first and second side regions of the thermoplastic jacket include a greater amount of a fire-retardant material than the center region of the thermoplastic jacket.

8. The belt of claim 4 , wherein the first side region is defined by the first side surface, the first and second traction surfaces, and a first side region boundary that extends between the first and second traction surfaces.

9. The belt of claim 8 , wherein the first side region is defined by a widthwise distance between the first side surface and the first side region boundary.

10. The belt of claim 8 , wherein the first side region is defined by a plurality of widthwise distances between the first side surface and the first side region boundary.

11. The belt of claim 4 , wherein the second side region is defined by the second side surface, the first and second traction surfaces, and a second region boundary that extends between the first and second traction surfaces.

12. The belt of claim 11 , wherein the second side region is defined by a widthwise distance between the second side surface and the second side region boundary.

13. The belt of claim 11 , wherein the second side region is defined by a plurality of widthwise distances between the second side surface and the second side region boundary.

14. The belt of claim 1 , wherein the thermoplastic jacket defines at least one blunt edge.

15. The belt of claim 1 , wherein the thermoplastic jacket is at least partially arcuately shaped.

Assignees

• Otis Elevator Co

Inventors

• Orelup Mark F
• Guilani Brad
• Sherrick Kathryn Rauss
• Lotfi Amir
• Yang Hong

Classifications

• B29D29/00

  Producing belts or bands · CPC title

• D07B1/162

  characterised by a plastic or rubber enveloping sheathing · CPC title

• D07B5/00

  Making ropes or cables from special materials or of particular form · CPC title

• D07B2501/2007

  Elevators · CPC title

• B29K2105/0026

  Flame proofing or flame retarding agents · CPC title